Following today's arraignment, dash-camera video from the October 24, 2014 incident was released to the public. The video shows Laquan McDonald, a black teenager, walking in the middle of the street with a knife in his right hand when he was shot 16 times by Jason Van Dyke, a white police officer.

Van Dyke turned himself into authorities on Tuesday and was charged with first-degree murder. He is being held without bond.

Protesters have gathered on Michigan Avenue in downtown Chicago to draw attention to McDonald's wrongful death. Police monitoring the event are on bikes and not wearing SWAT gear.

A female protester who appeared on Fox News' "Kelly File" repeatedly called for Emanuel's impeachment, claiming the mayor delayed the trial.

Over the past two years, a number of police shootings have attracted national attention. In 2014, looting, arson and protests erupted in Ferguson, Mo., after a grand jury found a police officer was not guilty in the death of Michael Brown.